Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Variant frequency of all nucleotide substitutions that occurred in the translated region after five blind passages in HBTEC-ALI, Vero/TMPRSS2, and Vero cells. Circle (○) shows newly occurring mutations after five blind passages, and cross (+) shows quasispecies that existed in the P0 inoculum. Black color shows mutations with no amino acid alteration (silent) and red color mutations with amino acid alterations (missense or frameshift).
